<html>
<body>

<h1>{{ q.question_text }}</h1>

<p style="color: red">{{ error_message }}</p>
<form action="{% url 'polls:vote' q.pk %}" method="post">
  {% csrf_token %}

  {% for c in q.choice_set.all %}
  <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{c.pk}}">
  <label for="choice{{ forloop.counter }}">{{ c.choice_text }}</label><br>
  {% endfor %}

  <input type="submit" value="OK">
</form>

</body>
</html>
